Parameters and technical specs

Every listing has structured parameters — the technical facts about the asset, stored as typed fields rather than free-text. They're what powers category-specific filters in the marketplace and they're how serious buyers compare apples to apples.

How the parameter system is organised

Parameters are defined per category in a catalog. When you pick a category for a new listing, the form unlocks the parameter set for that category. Some examples:

• Excavators — operating weight, engine hours, bucket capacity, year of manufacture, condition, drive type.
• Aircraft (piston single) — total time, engine time since overhaul, registration country, propeller type, avionics package.
• Heavy trucks — mileage, axle configuration, transmission type, fuel type, GVWR.
• Industrial pumps — flow rate, head, power, material, drive type.
• Aviation parts — part number, serial number, condition (NEW/SVC/AR/OH), traceability documents available.

Each parameter has a data type (number, integer, enum, string, date, boolean) and may have a unit (kg, kW, hp, hours, m³/h). Filtering uses the data type — number parameters get range sliders, enums get checkbox lists.

Why accurate parameters matter

Two reasons, both load-bearing:

1. Search and filters

Buyers filter on parameters. If you skip the operating weight on an excavator listing, your listing is excluded from any search where the buyer filtered by weight range. The same goes for hours, year, condition and so on. Incomplete parameters = invisible to half your potential buyers.

The same applies to the keyword search — parameter values are indexed alongside the title and description.

2. Conversion

Serious buyers want to compare assets directly. A listing with full parameters lands in a side-by-side comparison; a listing with three of fifteen parameters filled in gets dropped from the comparison early. Buyers reading "operating weight: not specified" assume you don't know — which is rarely the answer they want.

How to fill them

• Pick the right category first. The parameter set depends on the category. Switching categories after filling parameters loses values that don't carry over.
• Use the right units. The unit is shown next to each field. Mistakes here (entering kW where the field expects hp, or hours where the field expects miles) silently put your listing in the wrong bucket.
• Use real numbers, not "approximately". "About 5000 hours" doesn't help search. Either you know the number or you don't — if you don't, leave it blank rather than guess.
• Be honest about condition. USED is honest. NEW on a 5-year-old asset is not. Buyers verify condition against photos and inspection reports; misclassification gets caught and costs you trust.

Special cases

Enum values

For enum parameters (e.g. Condition: NEW / USED / REFURBISHED / DAMAGED) — pick the closest fit. The platform doesn't let you add custom values to enums. If the asset genuinely doesn't fit any enum value, explain in the description.

Missing parameters in the catalog

If you genuinely need a parameter that isn't in your category's catalog (e.g. a niche certification specific to your sub-sector), put it in the description with a clear label. Catalog additions are queued for review when enough listings ask for the same one.

Cross-category assets

Some assets fit two categories (a tractor with a snowplow attachment is both Agriculture → Tractors and Construction → Snow removal). Pick the primary category for the listing. Buyers in the secondary category can still find it via keyword search.

Auctions, rentals, and parts

Parameters work the same way for auctions and rentals. For parts, parameters double as the matching engine — buyers filter by exact part number, OEM, condition (NEW / SVC / AR / OH), and traceability. Parts listings without a part number are very hard to find.